Question: Write an assertion . Exercise 7.4.1 d. The database Systems, Complete Book Product(maker, model, type) PC(model, speed, ram, hd, price ) Laptop(model, speed, ram, hd,

Write an assertion. Exercise 7.4.1 d. "The database Systems, Complete Book"

Product(maker, model, type)

PC(model, speed, ram, hd, price )

Laptop(model, speed, ram, hd, screen , price )

Printer(model, color, type, price )

Write Assertion, If the relation Product mentions a model and its type, then this model must appear in the relation appropriate to that type.

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